Тетра медная

Copper Tetra or casamania Nana (lat. Hasemania nana) is a small fish that lives in rivers with dark water in Brazil. Is slightly more harmful than the other small tetras, and can break off the fins of other fish.

Casamania Nan is originally from Brazil, where it lives in the rivers with black water (blackwater), which darkens from a rich layer of leaves, twigs and other organic matter covering the bottom.